<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    *{
      margin: 0;padding: 0;
    }
    /* body{
      display: flex;
      justify-content: center;
    } */
    /* ul{
      display: flex;
      justify-content: center;
      align-items: center;
    } */
    li{
      list-style: none;
      width: 200px;
      height: 100px;
      text-align: center;
    }
    li:nth-child(1){
      background-color: antiquewhite;
    }
    li:nth-child(2){
      background-color: rgb(232, 93, 38);
    }
    li:nth-child(3){
      background-color: rgb(64, 248, 40);
    }
    li:nth-child(4){
      background-color: rgb(14, 225, 207);
    }
    li:nth-child(5){
      background-color: rgb(43, 43, 228);
    }
    li:nth-child(6){
      background-color: rgb(232, 25, 197);
    }
  </style>

  <!-- <style>
    
    li{
      width: 10rem;
    }
    @media screen and (min-width: 1000px){  
      html{
        font-size: 30px;
      }
    }
    @media screen and (min-width: 800px) and (max-width: 1000px){
      html{
        font-size: 20px;
      }
    }
    @media screen and (max-width: 500px){  
      html{
        font-size: 14px;
      }
    }
  </style> -->

  <!-- <style>
    @media screen and (min-width: 1000px){
      li{
        width: 300px;
      }
    }
    @media screen and (min-width: 800px) and (max-width: 1000px) {
      li{
        width: 200px;
      }
    }
    @media screen and (max-width: 500px){
      li{
        width: 100px;
      }
    }
  </style> -->

  <style>
    li{
      width: 20vw;
    }
  </style>
</head>
<body>
  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
    <li>4</li>
    <li>5</li>
    <li>6</li>
  </ul>
</body>
</html>